| 摘要 |
A catalyst component for use in the polymerization of alpha -olefins, comprising a compound represented by the following general formula [I]: <IMAGE> [I] wherein R1s represent a hydrogen atom, a C1-6 hydrocarbon group or a C1-12 hydrocarbon group containing silicon; each of R2 and R3 which forms the condensed ring represents a divalent C3-20 saturated or unsaturated hydrocarbon group, provided that at least one of R2 and R3 forms a ring condensed with the cyclopentadiene which is a seven- to twelve-membered ring having an unsaturated bond inherent in R2 or R3; Q represents a C1-20 divalent hydrocarbon group, a silylene group, a silylene group with a C1-20 hydrocarbon group, a germylene group, or a germylene group with a C1-20 hydrocarbon group; X and Y represent H, a halogen, a C1-20 hydrocarbon group, or a C1-20 hydrocarbon group containing oxygen, nitrogen or phosphorus; and M represents a Group IVB to VIB transition metal of the Periodic Table. Production of alpha -olefin polymers having a high melting point and a high molecular weight in a high yield and a process for producing alpha -olefin polymers is made possible upon the use of the catalyst.
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